抄録
In a second language environment, does a Japanese language learner's communication strategies (CS) change depending on whether to not they have classroom learning experiences? Speech data of 4 upper-intermediate Japanese learners was extracted from the "International Corpus of Japanese as a Second Language (I-JAS)" and CS was analysed regarding whether or not learning experiences in a classroom environment could be considered to be a factor in CS differences. Even in the same second language environment, there were differences in CS usage between Japanese language learners in a classroom environment and a natural environment.